Chris Lu
211bf4d2fe
format: add parquet adapter cutting extents at row-group starts
...
The footer already names every row-group byte range, so the adapter
only reads metadata: one extent per row group, the leading magic riding
with the first, and a trailing extent for the page indexes and footer.
Engines that fetch row groups by offset then read exactly the covering
chunks. Parquet needs no view; alignment alone delivers the benefit.
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